f(90)=2x+20

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Solution for f(90)=2x+20 equation: 


Simplifying
f(90) = 2x + 20

Reorder the terms for easier multiplication:
90f = 2x + 20

Reorder the terms:
90f = 20 + 2x

Solving
90f = 20 + 2x

Solving for variable 'f'.

Move all terms containing f to the left, all other terms to the right.

Divide each side by '90'.
f = 0.2222222222 + 0.02222222222x

Simplifying
f = 0.2222222222 + 0.02222222222x

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